CS►-database►mongodb

MongoDB 课程

M101J: MongoDB for Java Developers 笔记

class1

what count for final grade? homework & final exam

class2

  • non-relational: store data not in table like relational. json hireachi
  • schemaless:
  • mongodb is document oriented
  • not support joins between collectionos, not support sql
  • has dynamic shcema
    -

3 0 MongoDB Relative to Relational 没看懂

what features did mongodb omit inorder to retain scalability?
joins & transactions across multiple collections
not index, not secondary index

Overview of building an app with mongodb

  • spark java (a micro web framework inspired by sinatra)
  • freemaker to create html views
  • mongo java driver (connect to mongodb)

install mongodb

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bin/mongod - The database process.
bin/mongos - Sharding controller.
bin/mongo  - The database shell (uses interactive javascript).



$ ./mongod --help

To run a single server database:

$ mkdir /data/db
$ ./mongod
$
$ # The mongo javascript shell connects to localhost and test database by default:
$ ./mongo
> help

BSON

mondodb stores data as BSON or binary JSON （格式转换由mongo java driver来完成）

  • lightweight
  • traversable 可通过的 穿越的
  • efficient

CRUD

create
read
update
delete
video.movies movies collection in the video database

findOne m101.hw1

同一个collection中的所有doc必须有unique id

  • the heart of the query language for mongodb is a query by example strategy

SS

spark java embeds jetty inside of it

视频中依赖java7 sparkjava 0.9.9.4
sparkjava2必须要java8

hw1

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wget hw1....zip
unzip
mongorestore dump
mongo  # mongo shell
use m101 # swith to database m101
db.hw1.findOne()  # list all the docs in m101.hw1, 也可以db.hw1.find()

hw2

hw3